jan 1, 1934 - Harold "Kim" Philby a Secret Intelligence Service, begins to spy for the Soviet Union
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Harold "Kim" Philby was a senior officer in Britain's Secret Intelligence Service, known as MI6, who began to spy for the Soviet Union in 1934. He was known for passing more than 900 British documents over to the NKVD and its successor, the KGB. He served as a double agent.
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